Electric time-switch.



No. 865,432. PATENTED SEPT. 10, I907. W. D. ROSS.

ELECTRIC TIME SWITCH.

APPLICATION FILED DEO.1,1906.

WILLIAM DONALD ROSS, OF PROVIDENCE, RHODE ISLAND.

ELECTRIC TIME-SWITCH.

Specification of Letters Patent.

Patented Sept. 10, 1907.

Application filed December 1,1906- Serial No. 345,946.

To all whom it may concern:

Be it known that I, WILLIAM DONALD Ross, a citizen oi the United States, residing at Providence, in the State of Rhode Island, have invented a new and nseiul Improvement in Electric Time-Switches, oi which the following is a specification.

My invention relates to an improved automatic mechanism for throwing an electric switch into and out of engagement, at certain specific hours oi the day or night. And it consists in the improved construction oi an capement let off mechanism, arranged in connection with a clock movement, as hereinaiter set iorth.

In the accompanying drawings, Figure 1 represents a front view of my improved electric time switch. Fig. 2 represents a side view of the same. Fig. 3 represents a horizontal section taken in the line 3 3 oi Fig. 1, showing a top view of the electric switch. Fig. i represents a detail top view showing the deflected iorm oi the esc'apement levers.

In the drawing, A represents a spring actuated electric switch, the coiled spring oi which is inclosed in the cylindrical box B, the said box being arranged to revolve upon its pivot axis O, in the direction of the arrow shown in Fig. 3. The box B is provided with the escapement projections D D D D, and also with the Crossbars E and F, which are insulated from each other and adapted. for engagement with the opposite poles G G, and H H, oi the switch, from which the electric wires I I and .I .I extend to the electric power dispensing mechanism which is to be actuated at the indicated time.

The graduated dial K is rotated by means oi a clockmovement inclosed within the casing L, and carries with it the attached indicating arms M and N, the said arms being secured in proper position upon the face oi the dial by means oi the adjusting screw O. The indicating arms M and N are provided with the pointers on and 1t, respectively, which serve to indicate upon the dial K the hour at which the desired movement of the switch is to be effected.

To the base P which serves to support the casing L of the clock movement, are pivoted the escapement levers Q and R, by means of the screws a a, and to the side of the base P, and between the lower ends of the escapement levers Q and R, are pivoted the escapemcnt pawls S and T, which engage with the escapement projections D D, at the top of the box 13.

The lever Q is adapted at its upper end for engagement by the outwardly projecting pin q of the arm M, as shown in Fig. l, and the lever B is adapted at its upper end for engagement by the outwardly projecting pin 2' ol' the arm I, the said pin 1' being made longer than the pin q, and the arm M longer than the arm N. The lever R is oii'set at its upper end to a greater distance than the offset of the lever Q, in order that the said pins may properly engage and pass the said levers during the rotation oi the clock movement.

In the drawing, Fig. 1, the pin q is shown as about to pass out oi engagement with the outer side oi the upper end oi the escapement lever Q, and as the movement oi the arm M and pin q continues the inclined faces oi the escapemcnt lever will serve to cause the upper end of the said lever to be drawn inward, so that the escapement pawl S will be released from engagement with the lower end it oi the said cscapcmcnt lever, thus allowing the rotation oi the switch, until iurthcr movement is stopped by the engagement oi the succeeding escapement projection D, with the escapement pawl T. The switch then remains in this condition until the said escapement pawl T is ireed by the action oi the pin 1 upon the back of the escapement lever R, and this action of the escapement levers and pawls will be repeated continuously with the rotation of the dial K. And at ca ch revolution oi the dial, the switch will be thrown into and out of engagement, in accordance with the indicated time.

I claim as my invention:

1. In an electric time switch, the combination of a rotary dial, the indicating arms adjustable relatively to the dial and carried therewith, the pins projecting outward from the said arms, the escapement levers adapted to he engaged by the pins of the indicating arms, the rotary switch provided with the escapement projections, and the escapenient pawls operating between the escapement levers and the escapemcnt projections of the switch.

2. In an electric time switch, the combination of a rot: y dial, the indicating arms adjustable relatively to the dial and provided with outwardly projecting pins, one of the said arms being made longer than the other and provided with the longer pin, with an escapement lever adapted to receive the action of the longer pin and offset sui'liciently to allow the unobstructed passage of the shorter pin, and an oppositely arranged escapement lever adapted for the engagement of the said shorter pin there with, and means for limiting the backward movement of the said levers.

In an electric time switch, the combination of a rotary switch provided with the escapement projections. the escapement levers, means for limiting the outward movement of the said levers, and the escapement pawls which operate between the escapeinent levers and the escapement projections of the switch.

\VILLIAM DONALD ROSS.

Witnesses Socnii'rns ScIroLFInLD, WALTER LAMONT. 

